I'm contemplating an elevated level on my new layout, a U-pattern, with 180-degree turnarounds at each end of the "U".
I've used O27 tubular track on the main layout but am not limited to it for the elevated level though I have plenty of it. Space allows me 4 options for the turnarounds: (1) 27" curves with some straights; (2) a mix of 27" and 42" curves where I'd go 42-27-42-27; (3) Marx 34" curves that I don't currently have but could likely find; or (4) 36" curves using Fastrack.
I've never used curves of different radii back-to-back, but this option appears to be ideal for me. I like to put Johnson Rubber roadbed below my curves rather than trying to bend foam roadbed, and I have plenty of 27" and 42" roadbed curves to go with my tubular track.
Any issues going 42-27-42-27-42 for a 180-degree turnaround? I CAN limit the elevated to engines and rolling stock that navigate 27" curves.
